采用有限元方法对加力燃烧室隔热屏进行屈曲分析 ,通过对临界载荷与屈曲模态的计算 ,对隔热屏两种不同结构进行了对比 ,分析结果与试车结果相符。屈曲分析所需的气动和热负荷通过加力燃烧室流场及筒体和隔热屏壁温计算获得 ,计算结果与实验结果一致 ,表明本计算方法可供加力室隔热屏初步设计用 The finite element method is used to analyze the buckling analysis of afterburner heat shield. By comparing the critical load and buckling mode, two different structures of the heat shield are compared, and the results are in good agreement with those of the test run. The aerodynamic and thermal loads required for buckling analysis are calculated from the flow field in the afterburner chamber and the wall temperature of the cylinder and the heat shield. The calculated results agree well with the experimental results. The results show that this method can be applied to the initial design of the heat shield of the force-